python datetime.datetime how to change format code example

Example 1: timestamp change python

import time
timestamp = 1547281745
datetime = time.strftime('%A, %Y-%m-%d %H:%M:%S', time.localtime(timestamp))
print(datetime)

Example 2: how to set datetime format in python

import datetime

x = datetime.datetime(2018, 9, 15)

print(x.strftime("%b %d %Y %H:%M:%S"))

Example 3: converting datetime object format to datetime format python

df['date_time']=pd.to_datetime(df['date_time'], format='%d-%m-%Y %H.%M.%S')
#fomrat given in code should match the format of the feature
#here--> df['date_time'][0]=10-03-2004 18.00.00
#watchout for the blanks  '-' '.'